Safety-razor.



v G. L.`BONHA1VI.

SAFETY RAZOR. APPLICATION FILED FEB'. 211917.

Patented Apr. 30, 1918.

2 SHEETS-SHEET l. V

uoentoz G. l.. BONHAIV.

SAFETY RAZOR,

I v APPLICATION FILED FEB. 2111917. l @m., Patented Apr. 30, 1918.

l* 2 SHEETS-SHEET 2. l Ja Z entre en @1W L. xBIDNHAM, 0F WEST HARTFORD, CUNNEUTXGUT.

SAFETY-RAZOR.

Application filed `February 21, 1917.

To all whom t may concern." A

Be it known that l, GUY lh. BONHAM, a citizen ofthe `United States, residing at West Hartford, in the county et Hartford and State of Connecticut, have invented a new and useful Safety-Razor, of which the l following is a specication.

rl`he present invention appertains to safety razors of the rotary head type, such as disclosed in my 1,093,102 granted April la, 1914i and my patent on revolving safety razor and massage mechanism, No. 1,158,7 81 granted November 2, 1915.

llt is the object of the invention to provide a novel and improved rotary head for a safety razor ot the character indicated, said -head having' novel means for properly and edectiv'ely holding the razor blades, in orderthat their edges will4 be properly presented to the hairs.

Another obj ect et the invention is the pro- I vision of novel means for clamping doubleedged exible blades to the head with their edgesin helical lines, and with the blades clamped rmly in place between their edges, the blades being readily removed and replaced.

The invention also has t'or its object the provision ot" the improvements above noted and involving asimple, compact and inexpensive construction, which is practical and With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope ot what is claimed, without departing from the spirit oit the invention.

" The invention is illustrated in the accompanying drawings, wherein Figure 1 is a perspective view of one form yof the invention.

Specication of Letters Patent.-

patent on safety razor No. l

Patented Apr. 3th, 13113.. serial no. 150,235.

Fig. 5 is a reduced plan view ot one blade.

Fig. 6 is a view similar to Fig. 1 ot another form of the invention.

Fig. 7 is a section on the line 7-7 of Fig. 6.

Fig. 8 is a reduced plan view of one ot the blades used in the second form. 4

Fig. 9 is a reduced perspective view of one of the clamping plates used in the second form.

Fig. 10 is a perspective view of a third form oi the invention.

Figs. 11 and 12 are sections on the respective lines 11-11 and l2-12 ont Fig.. 10, similar to Figs. 2 and 3.

Fig. 13 is a reduced plan view of one oit the blades used in the third form.

Fig. la is a reduced perspective view of ene of the clamping plates used in the latter rorm.

rllhe 4head 1 is adapted to be mounted tor i rotation within a suitable casing or guard,

as disclosed in the above mentioned patents, and since the improvements reside in the other parts are not illustrated or described.

The head 1 embodies the end pieces 2 connected by the helical blade supports or beds 3 of arcuate cross section having their convexed surfaces facing outwardly. As illustrated, there are two of the supports 3, although any suitable number can be used. Fach support 3 is provided near its ends and between its edges with apertures or openings l, although any suitable number of apertures can be used in anydesired arrangement. I'llhe support 3 is also rovided adjacent to -its ends with outstan ing stay. I

pins or lugs 5. l

A helical Hexible or resilient razor blade 6 is adapted to rest against and conform to the curvature of each support 3, and is provided with opposite cutting edges 7 which yproJect beyond the edges of the support 3 since the blade is of greater'width than the support. rlhe blade 6 is provided with apertures or openings 8 coinciding or registering with the apertures A, and the blade is also provided near its ends with apertures 9 dior' receiving the lugs 5, whereby to hold the blade in proper position and prevent its displacement when applied to the support.

I Fach blade is clamped against its support p 3 by means or a helical clamping plate 10 is y substantially the same width as-the support and having its inner surface of the same curvature as the support, whereby the plate 10 in being drawn slightly toward the support 3 will Hex the blade 6 between the support and plate 10, and the blade will be clamped between said support and plate. The plate 10 is provided upon its inner side with a channel or elongated recess 11 between its edge portions, in order that only of each support 3, the support 3 having in-` wardly bent back flanges or lips 15 provid,- ing guide slots in which the edge portions ofthe plate 14 are slidable. One end piece 2 of. the head has a slot or o ening 16 through which one end portion o the plate v14 is slidable, and said rojecting end of the plate 14 has an inwar y yl bent ear or finger piece 17 whereby the plate 14 can be pulled outwardly and pushed inwardly. The plate 14 is provided near its ends and between its edges with key-hole shaped openings or apertures 18, and the plate 14 is indented around the tails of the apertures 18, as at 19.

In'assembling the arts, the locking late 14 is pulled outwar ly until the hea the apertures 18 register with the apertures 4, the blade 6 then being applied to the support 3 and being held in place by the studs or pins 5, after which the clamping plate 10 is applied with its Shanks or studs 12 projecting through the registering apertures 8, 4 and 18. The channel 11 accommodates the lugs or pins 5 which project through the apertures 4. rlfhe heads 13 move through said apertures to the inner side of the locking plate .14, and said locking plate is then pushed inwardly, so that the heads of the apertures 18 are moved away from the yapertures 4 and the tails of the apertures 18 engaged with the Shanks or studs 12, The inentations or inwardl projecting cam portions 19 will engage t e heads 13 and force them inwardly by a cam action, thus drawing the lates y10 tightly into place to firmly clamp t e blades 6 between the supports 3 4and clamping lates 10. 4In this manner, the blades 6 of t e head are firmly held in place in helical positions, with their cutting edges 7 in similar positions. The cylindrical path' of movement of the cutting edges 7 is outside of the outer convexed surfaces of the and 4.

clamping plates 10, since the curvatures of the inner surfaces of thev plates 10 and the supports 3 are eccentric, and the radii of said curvatures are of greater length than the radius of said path of rotation. The blades can be readily removed by pulling the locking plates 14 outwardly, thereby enabling the heads 13 to pass through the heads of the apertures 18 for removing the clamping plates 10, which in being removed permit the blades to be detached for sharpening and replacement.

In the modified construction illustrated in Figs. 5 and 6, each support 3 is provided with elongated slots or -apertures 4, and the blade 6 has similar slots or apertures 8 to register therewith, while the clamping plate 10 is provided with inwardly projecting lhooks 13 to move through said apertures 8 l The support 3 is preferably providedl with thickened portions or bosses 19 upon its inner surface for the engagement of the hooks 13 whose bills are inclined. The outer surface of the clamping plate`1() can be knurled or rou hened in order that said plate can be readily. shifted lengthwise of itself after the hooks 13 are inserted through the apertures 8 and 4', thus forcing thebills of the hooks with a cam action against the bosses 19', for drawmg the clamping plate 10 inwardly to tightly clamp the blade 6` against the support 3. Thls form requires the longitudlnal movement of the clamping plate 10, but eliminates the locking plate 14.

The form illustrated in Figs. 7, 8 and 9 embodies the longitudinal movement of the clamping plates 10, but eliminates the hooks 13 which are objectionable for certain uses, since they are more apt to bend or break than the headed studs 12 which are used in the' third form instead of the hooks. 'lfhe support 3 and blade 6 are provided with key-hole shaped apertures 4 and 8, respectively, which register with one another, for the insertion of the studs 12 therethrough, and the support 3 has studs 19. surrounding the tails of the apertures 4 1n order that when the heads 13 are inserted through said apertures and the plate 10 forced longitudinally, the heads 13 will ride onto the studs 19 with a camaction for forcing the plate 10 inwardly to tlghtly grlp the blade.

The rotary head when actuated withln a suitable guard will effectively sever the` projecting from its convex side, a blade .against the blade and having means .resting against the convex side of the support and having apertures to register with the aforesaid apertures and other apertures for the projection of said lugs therethrough, and a plate to clamp the blade against the support and having an inner longitudinal channel providing portions `at opposite sides thereof, to bear against the blade, said channelaccommodating said lugs, the clamping plate havin studs projecting ,therefrom Within said o annel through said registering apertures, and said studs and support having means lnterengageable by relative slid- 'y ing movement and cam action for drawing the plate toward the support.

2. A razor embodying a support having bent ,back edges, a member4 slidable along the support and guided by said edges, vakv blade resting against the support opposite said member, and ayclamping plate resting extending through said blade and support and enlllill slid, to clamp the parts together.

3. A razor embod g a blade support, having. bent back e ges providingguildes, a member slidable along one side of said support Within said guides, a blade-restinagainst the other side lont said support l a clamping plate restin against the blade laiddhaving, studs providged withV heads, said a e, tures for the passage of said studs, and said member having cam portions engageable With said heads by a sliding movement to clamp the parts together.

In testimony that ll claim the foregoing as my ovm, I have hereto axed my signa-v ture inthe presence of two Witnesses.

GUY L. BON.

Witnesses:

MARY L. WHrrMAN, H. C. WHITMAN.

.gageable with said member when the se is support and member having aper- 

